Worrisome Overheating - BMW Forum

Matty · 02-02-2007, 03:14 AM

So i just finished replacing my head gasket (85 318i) and had the head completely rebuilt while it was off, all in all took a month (99.999999999% of that was waiting for the shop to finish the head). So after about a day of tweaking things here and there and tightening the clamps that i didnt get tight enough at first she is running better than she ever has. mius the fact that she is running hot, it isnt hitting the red or even going past the 3/4th mark. I replaced the thermostat while i was in there. Any ideas as to why this might be happening? My only only thought is that when i first fired her up she was lower than i thought on coolant and overheated (i was poking around under the hood and didnt see the gauge). could the thermostat have been damaged by this? I heard the cooling systems were weak but thats rediculous. Please done tell me that i messed something up bad and have to do more major work!
Thanks
-David

Bear · 02-02-2007, 09:23 AM

Are the fan/s coming on when she goes past the middle mark on the gauge. Do you have both a viscous fan and and electric or one or the other?

Matty · 02-02-2007, 12:00 PM

I have both, but the electric fan has never work since i have owned her so it probably isnt that. but i was planning on looking into that.

Starmavin · 02-02-2007, 07:21 PM

Bleed the system, there is a bleed valve located near the thermostat housing. It'll take a few tries to get out all the coolant. Also, you should all ways install the thermostat with the little brass pined bleed hole up.

Matty · 02-02-2007, 09:25 PM

i have the 318 which has a different thermostat system, its external, in the coolant hose from the pump and engine to the radiator. There is not bleed hole. If you know of one else where on the engine but i don't think there is one, and the Bentley's doesnt say anything about bleeding the 4 cylinders. Im gonna replace the thermostat.

kenika65 · 03-20-2007, 12:40 AM

see the bleed screw!!! It is on every bmw. All the air will exit the cooling system from here then u will see coolant u may need to do this a couple of times to get all the air out of the engine.

Starmavin · 03-20-2007, 06:30 PM

Quote:

Originally Posted by kenika65

see the bleed screw!!! It is on every bmw. All the air will exit the cooling system from here then u will see coolant u may need to do this a couple of times to get all the air out of the engine.

Are you sniffing glue? Thats an e36. And no, it's in no way near the same on every bmw.....